Max downhill grade at TM?

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Greg_Lewis
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Location: Fresno, CA

Max downhill grade at TM?

Post by Greg_Lewis » Wed May 16, 2018 7:21 pm

The header says it. I understand that the max uphill grade is
3.69% at mile 10.18, on the track just past Little Falls. But what is the max downhill? Thanks.
Greg Lewis, Prop.
Eyeball Engineering — Home of non-interchangeable parts.
Our motto: "That looks about right."
Celebrating 30 years of turning perfectly good metal into bits of useless scrap.

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NP317
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Joined: Tue Jun 24, 2014 2:57 pm
Location: Northern Oregon

Re: Max downhill grade at TM?

Post by NP317 » Wed May 16, 2018 7:27 pm

I believe it is the 3.69% at Little Falls!
That's the grade that limits how many un-braked cars I can haul at Train Mt.!
Occasionally you see foot furrows in the down track ballast.
Oops...
~RN

Berkman
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Re: Max downhill grade at TM?

Post by Berkman » Wed May 16, 2018 7:37 pm

how long is the grade?

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NP317
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Location: Northern Oregon

Re: Max downhill grade at TM?

Post by NP317 » Thu May 17, 2018 8:44 am

Berkman wrote:
Wed May 16, 2018 7:37 pm
how long is the grade?
Maybe 150 feet, with easier grades on either end.
Long enough to scare an unsuspecting operator.
But it sure is fun to work a steamer up that grade!
Talks nicely.
~RN

Berkman
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Re: Max downhill grade at TM?

Post by Berkman » Thu May 17, 2018 8:50 am

There are a few long grades at TM right ? Like the serpentine ?

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NP317
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Location: Northern Oregon

Re: Max downhill grade at TM?

Post by NP317 » Thu May 17, 2018 8:56 am

Berkman wrote:
Thu May 17, 2018 8:50 am
There are a few long grades at TM right ? Like the serpentine ?
Yes. And the long grade to the north: 1.5% (?) for over a mile.
(I've not been to TM for 2 years. Will solve that in July.)
These grades separate the skilled steam engineers from the learning ones!
If you can hook up your valve gear for the hill and stomp your way right up,
then your engine is in good shape, and your water/fuel consumption will be noticeably lower.
My favorite challenges there.
~RN

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